Constitutional Daily:  “Comments from a GOP presidential contender and a federal judge have put the issue of states legalizing marijuana back on the constitutional front burner.  As many people know, four states and the District of Columbia have passed laws to make recreational pot use legal under certain circumstances. And 23 states and the federal district have legalized marijuana for medical use. . . . The conflict between state laws that allow limited marijuana use and the federal law that bars it, in theory, falls somewhere in the domain of the Constitution’s Supremacy Clause.”